SICK WL24-2 Series User manual
OPERATING INSTRUCTIONS
WL24-2
Compact photoelectric sensors
en, de, fr, pt, it, es, zh, ja, ru
Described product
W24-2
WL24-2
Manufacturer
SICK AG
Erwin-Sick-Str. 1
79183 Waldkirch
Germany
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reserved for SICK AG. Reproduction of this document or parts of this document is only
permissible within the limits of the legal determination of Copyright Law. Any modifica‐
tion, abridgment or translation of this document is prohibited without the express writ‐
ten permission of SICK AG.
The trademarks stated in this document are the property of their respective owner.
© SICK AG. All rights reserved.
Original document
This document is an original document of SICK AG.
2006/42/EC
NO
SAFETY
8008783.14BT | SICK
Subject to change without notice 3
Contents
1 General safety notes......................................................................... 5
1.1 Safety notes.............................................................................................. 5
2 Notes on UL approval........................................................................ 5
3 Correct use......................................................................................... 5
4 Operating elements and status indicators.................................... 5
5 Mounting............................................................................................. 6
6 Electrical installation........................................................................ 6
6.1 WL24-2Bxxx, WL24-2Vxxx........................................................................ 7
6.2 WL24-2Rxxx.............................................................................................. 8
7 Additional functions.......................................................................... 9
8 Commissioning.................................................................................. 10
9 Devices with special features.......................................................... 12
10 Troubleshooting................................................................................. 12
11 Disassembly and disposal............................................................... 13
12 Maintenance...................................................................................... 13
13 Technical data.................................................................................... 13
13.1 Dimensional drawing................................................................................ 15
CONTENTS
48008783.14BT | SICK
Subject to change without notice
1 General safety notes
1.1 Safety notes
■Read the operating instructions before commissioning.
■
Connection, mounting, and setting may only be performed by skilled per‐
son.
■
2006/42/EC
NO
SAFETY
Not a safety component in accordance with the EU Machinery Directive.
■
When commissioning, protect the device from moisture and contamination.
■These operating instructions contain information required during the life cycle of
the sensor.
2 Notes on UL approval
The device must be supplied by a Class 2 source of supply.
UL Environmental Rating: Enclosure type 1
3 Correct use
The WL24-2 is an opto-electronic photoelectric retro-reflective sensor (referred to as
"sensor" in the following) for the optical, non-contact detection of objects, animals, and
persons. A reflector is required for this product to function. If the product is used for any
other purpose or modified in any way, any warranty claim against SICK AG shall become
void.
4 Operating elements and status indicators
Table 1: Display and operating elements
WL24-2Bx4x
t2
t2
t1
t1
t1+ t2
t0
PNP
NPN
D
H
1
2
3
6
4
5
7
1Yellow LED indicator
2Potentiometer: adjust‐
ment of sensitivity
WL24-2Xx3x
PNP
NPN
D
H
1
2
3
4
1Yellow LED indicator
2Potentiometer: adjust‐
ment of sensitivity
WL24-2Rx4x
t2
t2
t1
t1
t1+ t2
t0
D
H
1
2
3
5
4
6
1Yellow LED indicator
2Potentiometer: adjust‐
ment of sensitivity
WL24-2Rx3x
D
H
1
2
3
1Yellow LED indicator
2Potentiometer: adjust‐
ment of sensitivity
GENERAL SAFETY NOTES 1
8008783.14BT | SICK
Subject to change without notice 5
3Switch: light (L) / dark
(D)
4Switch: NPN/PNP
5Potentiometer: adjust‐
ment of time delay t2
6Potentiometer: adjust‐
ment of time delay t1
7Potentiometer: adjust‐
ment of time stage
3Switch: light (L) / dark
(D)
4Switch: NPN/PNP
3Switch: light (L) / dark
(D)
4Potentiometer: adjust‐
ment of time delay t2
5Potentiometer: adjust‐
ment of time delay t1
6Potentiometer: adjust‐
ment of time stage
3Switch: light (L) / dark
(D)
5 Mounting
Mount the sensor and the reflector using suitable mounting brackets (see the SICK
range of accessories). Align the sensor and reflector with each other.
Note the sensor’s maximum permissible tightening torque of 2 Nm.
6 Electrical installation
The sensors must be connected in a voltage-free state. The following information must
be observed, depending on the connection type:
– Plug connection: note pin assignment: when the lid is open, the male connector
can be swiveled horizontally and vertically.
– Terminal connection: Note the permissible cable diameter of 5 to 10 mm. When
the lid is open, the M16 connector can be swiveled horizontally and vertically.
Unscrew the M16 connector and remove sealing plug. Lead voltage-free supply
cable through and connect sensor in accordance with table 2 and table 4.
Retighten M16 connector with seal so that the IP enclosure rating of the device is
ensured.
Figure 1: Opening the sensor Figure 2: Electrical connection
Only apply voltage/switch on the power supply once all electrical connections have
been established.
Explanation of the connection diagram (Tables 2-7) which are divided up into DC and
AC/DC devices:
Alarm = alarm output (see table 2 and Additional functions)
n. c. = not connected
NC = normally closed
NO = normally open
Q / Q = switching outputs
5 MOUNTING
68008783.14BT | SICK
Subject to change without notice
TE/Test = test input (see table 2 and table 7)
6.1 WL24-2Bxxx, WL24-2Vxxx
UB: 10 . 30 V DC, see "Technical data", page 13
Table 2: DC
WL24-2 B3x3 B2x0 V2x0 B4x0 V5x0
1+ (L+) + (L+) + (L+) + (L+) + (L+)
2- (M) - (M) - (M) Test Test
3Q/Q- Alarm - (M) - (M)
4-Q/QQ/QQ/QQ/Q
5- Test Test - Alarm
IN = 4 A
1 2 3 4 5
0.14 ...
1.5 mm2
IN = 4 A
1 2 3 4 5
0.14 ...
1.5 mm2
IN = 4 A
12
4 3
12
5
4 3
ELECTRICAL INSTALLATION 6
8008783.14BT | SICK
Subject to change without notice 7
Table 3: DC
H
D
3
NPN
PNP
4
H, PNP: Q/Q (≤ 100 mA)
+ (L+)
Q/Q
– (M)
+ (L+)
Q/Q
– (M)
D, PNP: Q/Q (≤ 100 mA)
+ (L+)
Q/Q
– (M)
+ (L+)
Q/Q
– (M)
H, NPN: Q/Q (≤ 100 mA)
+ (L+)
Q/Q
– (M)
+ (L+)
Q/Q
– (M)
D, NPN: Q/Q (≤ 100 mA)
+ (L+)
Q/Q
– (M)
+ (L+)
Q/Q
– (M)
6.2 WL24-2Rxxx
UB 20 V ... 250 V AC/DC, see "Technical data", page 13
Table 4: AC/DC
WL24-R2x0 WL24-2R5x8
1L1 N
2N NC
3Relay n. c.
4Relay NO
5Relay L1
1 2 3 4 5
0.14 ... 1.5 mm2
3
4
15
2
≤ 4 A
6 ELECTRICAL INSTALLATION
88008783.14BT | SICK
Subject to change without notice
Table 5: AC/DC relay
Relay
H
D
3WL24-2R2x0
H
3
4
5
3
4
5
Imax. = 4A@250V AC
4A@24V DC
0.125A@250 V DC
UL: 4A @ 250 V AC, general
use
4A @ 250 V AC, resistive
(NO)
3A @ 250 V AC, resistive
(NC)
4A @ 24 V DC, NO, general
use
3A @ 24 V DC, NC, general
use
R300
B300 (NO contacts only)
D
3
4
5
3
4
5
WL24-2R5x8, WL24-2R5x9: Imax. = 2.5 A @ 250 V AC, 2.5 A @ 24 V DC, 0.125 A @ 250
V DC
7 Additional functions
Alarm
Alarm output: the sensor (WL24-2Vxxx) features a pre-failure notification output
(“Alarm” in connection diagram [see "WL24-2Bxxx, WL24-2Vxxx", page 7]), which issues
a notification if the sensor is only ready for operation to a limited extent. The LED indi‐
cator flashes in this case. Possible causes: sensor or reflector is contaminated, sensor
is out of alignment. In the good state: LOW (0), if excessively contaminated HIGH (1).
Table 6: Alarm
Alarm (≤ 100 mA)
+ (L+)
Alarm
– (M)
+ (L+)
Alarm
– (M)
ADDITIONAL FUNCTIONS 7
8008783.14BT | SICK
Subject to change without notice 9
Test input
Test input: the WL24-2B / -V sensors feature a test input (“TI” or “Test” on the connec‐
tion diagram [see "WL24-2Bxxx, WL24-2Vxxx", page 7 and see table 7]), which can be
used to switch the sender off and, therefore, check that the sensor is functioning cor‐
rectly: if female cable connectors with LED indicators are used, you have to ensure that
the TI is assigned accordingly.
There must be no object between the sensor and reflector; activate the test input (see
the connection diagram [see "WL24-2Bxxx, WL24-2Vxxx", page 7 and see table 7], TE at
0V at PNP) (PNP: TE → M; NPN: TE → L+). The send LED is shut down or the detection
of an object is simulated. Use the following table to check the function. If the switching
output fails to behave in accordance with the following table, check the application con‐
ditions. See section Fault diagnosis.
Table 7: Test
Test
+ (L+)
Test
– (M)
+ (L+)
Test
– (M)
8 Commissioning
1Alignment
Align the sensor with a suitable reflector. Select the position so that the red emitted light
beam hits the center of the reflector. The sensor must have a clear view of the reflector
with no object in the path of the beam [see figure 3 and figure 4]. You must ensure that the
optical openings of the sensor and reflector are completely clear.
Figure 3: Alignment Figure 4: Alignment 2
2Sensing range
Adjust the distance between the sensor and the reflector according to the corresponding
diagram [see following figure] (x = sensing range, y = operating reserve).
7 ADDITIONAL FUNCTIONS
10 8008783.14BT | SICK
Subject to change without notice
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